General

  • Target

    7737fb5fa7440206dbbd7dbeb8222a2851caf6210005e37d6d5d765081940e9a.exe

  • Size

    17.5MB

  • Sample

    240904-q9shxasgje

  • MD5

    fe194bd31f2388a09bbef24ddaa212ce

  • SHA1

    cb01c1cb0a2fc192c28b3d7864e739d9d8575e08

  • SHA256

    7737fb5fa7440206dbbd7dbeb8222a2851caf6210005e37d6d5d765081940e9a

  • SHA512

    c682844cbe5899465e6ba14304a7d6cdfabb41c2f31c94e0407af953cf9889ed70da6a27615d868e2e9fa7f3711db488741c3cd68789a5ed7ac4fb1a60478054

  • SSDEEP

    393216:2VVC+w99uPfkiyV4wqWisNWhQkUS9O6OKpsSH+sWTF:2m/fiyyFWFN7kJOKpsk+sWJ

Malware Config

Targets

    • Target

      7737fb5fa7440206dbbd7dbeb8222a2851caf6210005e37d6d5d765081940e9a.exe

    • Size

      17.5MB

    • MD5

      fe194bd31f2388a09bbef24ddaa212ce

    • SHA1

      cb01c1cb0a2fc192c28b3d7864e739d9d8575e08

    • SHA256

      7737fb5fa7440206dbbd7dbeb8222a2851caf6210005e37d6d5d765081940e9a

    • SHA512

      c682844cbe5899465e6ba14304a7d6cdfabb41c2f31c94e0407af953cf9889ed70da6a27615d868e2e9fa7f3711db488741c3cd68789a5ed7ac4fb1a60478054

    • SSDEEP

      393216:2VVC+w99uPfkiyV4wqWisNWhQkUS9O6OKpsSH+sWTF:2m/fiyyFWFN7kJOKpsk+sWJ

    • Chaos

      Ransomware family first seen in June 2021.

    • Chaos Ransomware

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Modifies boot configuration data using bcdedit

    • Renames multiple (188) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

    • Disables Task Manager via registry modification

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks